
public class ErShi {
	public static void main(String[] args){
		int i = 90;
		int j = 2;
		
		do{
			if(i%j==0){
				System.out.print(j);
				if(j<i){
					System.out.print("*");
				}
				i/=j;
			}else{
				j++;
			}
			
			
		}while(j<=i);
				
	}
}
